Abstract
The influence of tillage, and 2 seed bed configurations on soil physical properties and responses of cassava (Manihot esculenta), cowpea (Vignia unguiculata L. Walp), and maize (Zea mays L.) was studied for two cropping seasons in 1978 under mulch and no-mulch conditions. The study was conducted on an Alfisol at the Ife (Nigeria) University teaching and Research Farm. Tillage reduced soil bulk density at planting (1.43 g/cc) by 23%. Six weeks after seeding, the bulk density of ridges and mounds had increased by 24% compared to 3.5% increase for no-tillage plots under bare condition. Mulching reduced soil compaction of tilled plots by 50% while compaction was negligible on the mulched no-tillage plots. Soil moisture reserve, 3 weeks after planting was higher by 5 and 8 percent (of cumulative rainfall) respectively for no-tillage and ridged plots compared to mounds under unmulched conditions. In the same correspondent order soil temperature was, respectively, lower by 3oC and 1oC than in mounds during the period. Mulch effect on soil moisture and temperature was more significant with no-tillage compared to ridges and mounds. Yield of cassava was reduced by only 13% when grown with no-tillage plus mulch, compared to 40% with no-tillage without mulch. There was no significant effect of tillage on cowpea yield. Yield results reflected differences in soil moisture and temperature regimes which influenced seedling germination, stand and subsequent plant development.
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Claims 14
Claim · model-written summary
Tillage reduced soil bulk density at planting by 23%.
- Taxon
- CASSAVA, COWPEA AND MAIZEt0
- Treatment
- Tillagee0
- Outcome
- soil bulk densitye0
- Direction
- reducede0
- Value
- 23%e0
- Qualifier
- at planting (1.43 g/cc)e0
Not reportedComparator
Verbatim
e0“Tillage reduced soil bulk density at planting (1.43 g/cc) by 23%”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Bulk density on ridges and mounds rose by 24% after six weeks under bare conditions.
Verbatim
e0“Six weeks after seeding, the bulk density of ridges and mounds had increased by 24% compared to 3.5% increase for no-tillage plots under bare condition”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Bulk density in no-tillage plots rose by 3.5% after six weeks under bare conditions.
Verbatim
e0“Six weeks after seeding, the bulk density of ridges and mounds had increased by 24% compared to 3.5% increase for no-tillage plots under bare condition”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Mulching reduced soil compaction of tilled plots by 50%.
- Taxon
- CASSAVA, COWPEA AND MAIZEt0
- Treatment
- Mulchinge0
- Outcome
- soil compaction of tilled plotse0
- Direction
- reducede0
- Value
- 50%e0
Not reportedComparator
Verbatim
e0“Mulching reduced soil compaction of tilled plots by 50%”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Compaction was negligible in mulched no-tillage plots.
Verbatim
e0“compaction was negligible on the mulched no-tillage plots”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Under unmulched conditions, no-tillage increased soil moisture reserve by 5 percent of cumulative rainfall relative to mounds.
Verbatim
e0“Soil moisture reserve, 3 weeks after planting was higher by 5 and 8 percent (of cumulative rainfall) respectively for no-tillage and ridged plots compared to mounds under unmulched conditions”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Under unmulched conditions, ridged plots increased soil moisture reserve by 8 percent of cumulative rainfall relative to mounds.
Verbatim
e0“Soil moisture reserve, 3 weeks after planting was higher by 5 and 8 percent (of cumulative rainfall) respectively for no-tillage and ridged plots compared to mounds under unmulched conditions”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Soil temperature under no-tillage was 3oC lower than in mounds.
Verbatim
e0“soil temperature was, respectively, lower by 3oC and 1oC than in mounds”
e1“for no-tillage and ridged plots compared to mounds”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Soil temperature under ridges was 1oC lower than in mounds.
Verbatim
e0“soil temperature was, respectively, lower by 3oC and 1oC than in mounds”
e1“for no-tillage and ridged plots compared to mounds”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Mulch affected soil moisture and temperature more significantly under no-tillage than ridges and mounds.
- Taxon
- CASSAVA, COWPEA AND MAIZEt0
- Treatment
- Mulche0
- Outcome
- soil moisture and temperaturee0
- Qualifier
- with no-tillagee0
- Comparator
- ridges and moundse0
Not reportedDirection
Verbatim
e0“Mulch effect on soil moisture and temperature was more significant with no-tillage compared to ridges and mounds”
t0“CASSAVA, COWPEA AND MAIZE”
Claim · model-written summary
Cassava yield fell by 13% with no-tillage plus mulch.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- no-tillage plus mulche0
- Outcome
- Yield of cassavae0
- Direction
- reducede0
- Value
- 13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of cassava was reduced by only 13% when grown with no-tillage plus mulch”
t0“CASSAVA”
Claim · model-written summary
Cassava yield fell by 40% with no-tillage without mulch.
- Taxon
- cassavaManihot esculentae0
- Treatment
- no-tillage without mulche0
- Outcome
- Yield of cassavae0
- Direction
- reducede0
- Value
- 40%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield of cassava was reduced by only 13% when grown with no-tillage plus mulch, compared to 40% with no-tillage without mulch”
t0“CASSAVA”
Claim · model-written summary
Tillage had no significant effect on cowpea yield.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- tillagee0
- Outcome
- cowpea yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant effect of tillage on cowpea yield”
t0“COWPEA”
Claim · model-written summary
Soil moisture and temperature differences influenced crop seedling germination, stand and development.
Verbatim
e0“Yield results reflected differences in soil moisture and temperature regimes which influenced seedling germination, stand and subsequent plant development”
t0“CASSAVA, COWPEA AND MAIZE”
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See all 7 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.